Montgomery County Soil Data
Montgomery County, Arkansas
USDA SSURGO / PHZMAvg pH
5.4
Texture
Loam
Drainage
N/A
Organic Matter
2.4%
Hydrologic Group
D
Data Story
About Soil in Montgomery County, Arkansas
Acidic soils define the Ouachita foothills
Montgomery County soils are notably acidic with an average pH of 5.44, falling well below the national median of 6.5. While specific taxonomic data is limited for this area, the overall soil health score of 30.0 suggests a environment that requires careful management. Most local growers find that regular lime applications are essential to balance these levels for standard crops.
A sandy and silty profile
The soil composition is a mix of 45.9% sand and 36.6% silt, providing a gritty texture that is relatively easy to till. With clay making up only 15.1% of the profile, the soil lacks the heavy structure found in the Delta. This balance allows for decent root penetration but may struggle to retain fertilizers during heavy rains.
Lower water capacity than state averages
Organic matter sits at 2.35%, which is higher than the national average of 2.0% but far below the Arkansas state average of 4.15%. The available water capacity of 0.126 in/in also trails the state benchmark of 0.148 in/in. Gardeners should prioritize mulching and compost additions to improve these moisture-holding capabilities.
High runoff risks in Group D
The county falls into Hydrologic Group D, indicating soils that have a very slow infiltration rate when thoroughly wetted. While specific drainage class data is unavailable, this group designation suggests a high potential for surface runoff during the region's heavy spring storms. Site planning should include strategies for managing excess water to prevent erosion on sloped terrain.
Success in Hardiness Zone 8a
In USDA Zone 8a, Montgomery County provides a long growing season for heat-tolerant favorites like okra, sweet potatoes, and southern peas. Blueberries and azaleas thrive in the naturally acidic soil without the need for intensive pH adjustments. Local residents can start a productive garden by focusing on these acid-loving varieties and supplementing with organic matter.
Soil Composition
Soil pH
Soil Series
Detailed soil series data not yet available for this county.
Hydrologic Group
Group D — High Runoff
Clay soils with very slow infiltration rates. Highest runoff potential. These soils have a permanent high water table or are shallow over impervious material.
Drainage Class
Drainage class data not available.
Soil Profile
Dominant texture: Loam
Typical soil profile. Actual depths vary by location.
USDA Soil Orders
Acidic Soil Detected
Your county's average pH is 5.4. These products help balance soil pH for healthier grass.
Browse Soil AmendmentsFrequently Asked Questions
What type of soil does Montgomery County have?
Montgomery County's soil is classified as Loam. This indicates the relative proportions of sand, silt, and clay — 46% sand, 37% silt, and 15% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Montgomery County's soil acidic or alkaline?
Montgomery County's soil has a low pH of 5.4, which is strongly acidic. Acidic soils benefit from lime applications to raise pH and improve nutrient availability.
What is the drainage class for Montgomery County?
Drainage class data is not currently available for Montgomery County.
What crops or plants grow well in Montgomery County's soil?
Based on Montgomery County's Loam texture, pH of 5.4, and drainage class, the soil is well suited for acid-loving plants like blueberries and azaleas, row crops and vegetable gardens.
What USDA soil order is found in Montgomery County?
The dominant USDA soil order for Montgomery County is not currently available in our dataset.
Soil & Planting Advisory: Montgomery County
Soil Verdict
Montgomery County is in USDA hardiness zone 8a, a warm climate zone. where winter lows can reach 10°F. Mild winters mean soil rarely freezes deeply, allowing year-round microbial activity and faster organic matter breakdown.
Planting Guidance
Warm-season crops, citrus relatives, and heat-loving ornamentals do well. Cool-season vegetables should be planted in fall and winter. Always match plant selections to the specific microclimate of your property — low spots, slopes, and wind exposure can shift effective hardiness by half a zone.
Soil Implications
Warm soils accelerate organic matter breakdown, so compost and mulch need replenishing more frequently than in cooler zones. Sandy soils common in warm zones drain quickly; water-retentive amendments like compost or peat help hold moisture.
Regional Context
Montgomery County closely matches the Arkansas average hardiness conditions. The zone range of 7b-8a within the county means soil and planting decisions should account for local elevation and topography.
Planning your lawn? View lawn care data for Montgomery County on LawnByCounty.com →
Other Counties in Arkansas
Soil data sourced from USDA SSURGO via Soil Data Access. Data is informational only and should not be used as a substitute for on-site soil testing. Contact your local NRCS office for site-specific soil information.